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Updated: Jun 26, 2026
09:04
A Direct, Early Stage Guanidinylation Protocol for the Synthesis of Complex Aminoguanidine-containing Natural Products
Published on: September 9, 2016
Cytotoxic guanidine alkaloids from Pterogyne nitens
Luis Octávio Regasini1, Ian Castro-Gamboa, Dulce Helena Siqueira Silva
1Institute of Chemistry, Nucley of Bioassay, Biosynthesis and Ecophysiology of Natural Products, NuBBE, Sao Paulo State University, UNESP, Araraquara, SP, Brazil.
Journal of Natural Products
|January 23, 2009
Summary
Researchers discovered two new guanidine alkaloids, nitensidines D and E, from Pterogyne nitens. Nitensidine E showed anticancer potential by exhibiting cytotoxicity against human leukemia and glioblastoma cells.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Bioprospecting programs aim to discover novel therapeutic compounds from natural sources.
- Guanidine alkaloids are a class of natural products with diverse biological activities.
- Pterogyne nitens is a plant species that may contain bioactive compounds.
Purpose of the Study:
- To isolate and characterize new guanidine-type alkaloids from Pterogyne nitens.
- To evaluate the cytotoxic potential of isolated compounds against human cancer cell lines.
- To identify lead compounds for the development of anticancer drugs.
Main Methods:
- Isolation of alkaloids from Pterogyne nitens leaves using chromatographic techniques.
- Structure elucidation of new compounds (nitensidines D and E) via spectroscopic data interpretation (NMR, MS).
- Cytotoxicity assays using a panel of human cancer cell lines (e.g., HL-60, SF-245).
Main Results:
- Two new guanidine alkaloids, nitensidines D (1) and E (2), were isolated and characterized.
- Known alkaloids pterogynine (3), pterogynidine (4), and galegine (5) were also identified.
- Nitensidine E (2) demonstrated significant cytotoxicity against HL-60 (human myeloblastic leukemia) and SF-245 (human glioblastoma) cells.
Conclusions:
- Pterogyne nitens is a source of novel guanidine alkaloids with potential anticancer properties.
- Nitensidine E shows promise as a lead compound for further investigation in anticancer drug discovery.
- The study highlights the value of bioprospecting for identifying new therapeutic agents.
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